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Firefox 143 (Fedora distribution) throws SEC_ERROR_UNKNOWN_ISSUER error on many websites

DeltaDizzy
DeltaDizzy
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When trying to access many popular websites with Firefox on my Fedora 43 installation, I am greeted with a security warning page with the SEC_ERROR_UNKNOWN_ISSUER error. For most of these websites I can simply accept and continue, but HSTS-only sites will not permit this.

Affected websites include but are not limited to (based on exceptions in the certificates section of Firefox settings):

Any help in resolving this is appreciated.

When trying to access many popular websites with Firefox on my Fedora 43 installation, I am greeted with a security warning page with the SEC_ERROR_UNKNOWN_ISSUER error. For most of these websites I can simply accept and continue, but HSTS-only sites will not permit this. Affected websites include but are not limited to (based on exceptions in the certificates section of Firefox settings): * github.io (many subdomains) * purdue.edu (many subdomains) * iu.edu * ebay.com * cbsnews.com * iwm.org.uk * home.cern * celestrak.org Any help in resolving this is appreciated.

Wšykne wótegrona (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
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If you use the View Certificate link (sometimes, this requires clicking the Advanced button), is there any pattern to the issuer, such as a proxy server or security software vendor?

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